Those teenagers were on their way home from school when a stranger threatened their lives with a gun. The incident happened in an Alief neighborhood near Eldridge Parkway and Ortega Lane.

They weren't the only victims. Another teen was held up just a block away in the same Alief neighborhood.

The Harris County Sheriff's Office is investigating reports of two incidents on Monday where a man robbed high school girls and asked them to get in his car. We are told there may be more reports out there.

It started at the bus stop where Alief Taylor High School student Eleshia North and a friend got off the bus. That's when a man pulled up to the girls.

"He's like, 'Come here and give me your phone.' He pulled a small black gun to me and my friend, so I gave him my phone and he's like, 'Do you have any money? And I'm like, 'No.' And he's like, 'Get in the car.' And I said, 'No,'" said Eleshia.

The 17-year-old junior and her 15-year-old friend described the suspect as an Hispanic male, between 18 and 21-years-old, and driving a gray SUV. The victims only saw the partial license plate of ''01L ? N'.

"I grabbed my friend's hand and we went straight through my neighbor's fence right here, and I told her to wait by the trees until the coast was clear. We went to my house and banged on the door," said Eleshia.

The girls said the man tried to follow in his SUV, but fled when they got to Eleshia's house, where her mom and dad were inside.

"We just proceeded to run outside to see if we could see the vehicle and we couldn't. We called 911 and tried to get them calmed down," said Eleshia's mother, Ivory North.

A second, similar incident happened about ten minutes later on Bonilla Street to a 15-year-old Kerr High School girl.

"It's a cause for concern because he's targeting children," said Sgt. Noel Araguz of the Harris County Sheriff's Office.

Authorities said there may be more cases, but they're still investigating.

Alief ISD said they are increasing police presence, and transportation supervisors will be out at bus stops. Principals will be talking to students at both high schools on Wednesday.